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Social-media inoculation and "prebunking" shown to reduce receptivity to antisemitic tropes, panelists say
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Summary
Dr. Brian Hughes presented evidence that short prebunking videos increased viewers' ability to recognize and resist antisemitic propaganda, reporting measurable changes in attitudes and intent to challenge false claims.
Dr. Brian Hughes, director of the Countering Antisemitism Laboratory at the University of Southern California’s Shoah Foundation, told the U.S. Helsinki Commission briefing that the digital ecosystem accelerates the spread and rebranding of antisemitic myths—and that targeted “prebunking” interventions can reduce the harm.
Hughes described the rapid evolution of antisemitic narratives in the digital age and likened the process to viral mutation: although the underlying prejudice remains constant, its rhetorical forms change quickly to match current cultural moments. “In the age of digital media, they evolve on a nearly weekly basis,” he said.
He presented experimental evidence from a 2024 prebunking campaign targeted at U.S. college-age viewers. A 90-second video that explained manipulative tactics used to promote sympathy for Hamas produced statistically measurable changes among viewers compared with a control group: viewers were 17.7% more likely to recognize the propaganda as manipulative, 7.3% more likely to disagree with the claim on factual grounds, and 23.9% more likely to say they would challenge the trope when encountered online or offline. Hughes also said a paid rollout suggested an effective inoculation could be achieved for “less than $1 per successful inoculation.”
Hughes emphasized that prebunking is not a cure for committed extremists; rather, it is effective for the “movable majority” whose attitudes determine whether propaganda gains traction. He explained the difference between prebunking (preventive exposure to weakened forms of misleading arguments) and debunking (post-hoc factual correction) and argued that addressing emotional and persuasive techniques is crucial.
In Q&A, panelists and audience members discussed what can prompt deradicalization and how community ties and life events can help reverse online radicalization. Hughes said deradicalization is “not very well understood” and tends to be idiosyncratic, but that personal disillusionment with extremist milieus and meaningful interpersonal ties can facilitate change.
Ending: The panel highlighted prebunking as a scalable, evidence-based tool that, paired with ongoing boosters and community-based interventions, can reduce the spread and impact of antisemitic propaganda in online spaces.
